发明名称 |
Wassergeschäumte Polystyrolpartikel |
摘要 |
The invention relates to a method for producing polystyrene foam particles, according to which polystyrene beads containing water as only inflating agent are expanded. The method comprises the following steps: a) the polystyrene beads are expanded at temperatures above 100 DEG C; b) the expanded beads are dried in dry air at between 20 and 95 DEG C for between 1 and 10 hours; c) the dried particles are expanded further at between 100 and 140 DEG C using water vapour; and d) steps b) and c) are repeated until the desired bulk density is obtained.
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申请公布号 |
DE19812854(A1) |
申请公布日期 |
1999.09.30 |
申请号 |
DE1998112854 |
申请日期 |
1998.03.24 |
申请人 |
BASF AG |
发明人 |
GLUECK, GUISCARD;HAHN, KLAUS;GELLERT, ROLAND |
分类号 |
B29C44/34;C08J9/22;(IPC1-7):C08L25/04;C08J9/28 |
主分类号 |
B29C44/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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